Question

    A warm drink of milk before bed has long been the best choice for those wanting a good night’s sleep. But now a study has found it really does help people nod off—if it is milked from a cow at night.

Researchers have discovered that “night milk” contains more melatonin(褪黑激素), which has been proven to help people feel sleepy and reduce anxiety.

The study, by researchers from Seoul, South Korea, involved mice being fed with dried milk powder made from cows milked both during the day and at night.

Those given night milk, which contained 10 times the amount of melatonin, were less active and less anxious than those fed with the milk collected during daytime, according to the study published in The Journal of Medicinal Food.

Night milk quickened the start of sleep and caused the mice to sleep longer.

While the effect of cows milk harvested at different time has not been tested on humans up to now, taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.

Previous studies have also indicated that milk can be excellent for helping sleep because of the calcium content, which helps people to relax.

Milk is also sugar-free and additive-free with nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening. The more fat you take in before bedtime, the greater burden you will put on your body at night.

1.According to the text, the mice fed with daytime milk_______.

A.started sleep more easily

B.were more anxious

C.were less active

D.woke up later

2.Which of the following is true of melatonin according to the text?

A.It’s been tested on mice for ten times.

B.It can make people more energetic.

C.It exists in milk in great amount.

D.It’s used in sleeping drugs.

3.What can be a suitable title for the text?

A.Night Milk and Sleep

B.Fat, Sugar and Health

C.An Experiment on Mice

D.Milk Drinking and Health

4.How does the author support the theme of the text?

A.By giving examples.

B.By stating arguments.

C.By explaining statistical data.

D.By providing research results.

Answer

1.B

2.D

3.A

4.D

【解析】

这是一篇说明文。人们都知道，晚上睡觉前喝一杯暖暖的牛奶会睡个好觉。不过一项新的研究表明，喝夜晚产的牛奶比喝白天产的牛奶更有助于睡眠。

1.细节理解题。根据第四段中的“Those given night milk,which contained 10 times the amount of melatonin,were less active and less anxious than those fed with the milk collected during daytime.” 那些在喝夜晚产的牛奶的老鼠，其褪黑激素的含量是喝白天产的牛奶的老鼠的10倍，比喝白天产的牛奶的老鼠更不活跃，也不那么焦虑。可知，喝夜晚产的牛奶的老鼠相对焦虑会更少些，换言之，喝白天产的牛奶的老鼠焦虑会多些。故选B项。

2.细节理解题。根据第六段中的“taking melatonin drugs has been suggested to those who are struggling to fall asleep at night.”有人建议夜间难以入睡的人服用褪黑激素药物。可知，此处建议有睡眠障碍的人服用含褪黑激素的药，由此可推知，它已被用于助眠药物中。故选D项。

3.主旨大意题。由文章第一段中的“But now a study has found it really does help people nod off—if it is milked from a cow at night.”但现在一项研究发现，如果牛奶是在晚上从奶牛身上挤奶的，它确实能帮助人们打盹；最后一段“nutritionists recommending skimmed milk as the best choice before bed as it is the least fattening.”营养学家推荐脱脂牛奶是睡前的最佳选择；同时全文内容围绕喝夜晚产的牛奶与睡眠展开。故选A项。

4.推理判断题。根据“But now a study has found…”，“Researchers have discovered that…”，“The study,by researchers from…”以及“Previous studies have also indicated…”可以发现文章中多次出现了研究者及其研究结果，可知，在这篇文章作者是通过提供研究结果来支持文章主题的。故选D项。